Have been experimenting with various backpacks and ways to make the whole thing as compact as possible to carry to remote sites. To make packing easier I adapted 2 bungees to keep the cage supports tightly together. Found them an Amazon - 6" long.
I can place my helmet inside the frame plus a bunch of other stuff. The backpack is comfortable to hike with. I also made out of Cordura material this time, a cage hoop sleeve held to the side of the bag with the original compression straps.
I can also use the harnesse’s bottom pocket (seen at the top on the photo) for additional storage space and a butt foam protector.